31001221132 has 12 divisors (see below), whose sum is σ = 62002442320. Its totient is φ = 13286237616.

The previous prime is 31001221093. The next prime is 31001221151. The reversal of 31001221132 is 23112210013.

31001221132 is an admirable number.

It is a super-2 number, since 2×31001221132² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553593207 + ... + 553593262.

Almost surely, 2^31001221132 is an apocalyptic number.

It is an amenable number.

31001221132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31001221132 is a wasteful number, since it uses less digits than its factorization.

31001221132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107186480 (or 1107186478 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31001221132 its reverse (23112210013), we get a palindrome (54113431145).

The spelling of 31001221132 in words is "thirty-one billion, one million, two hundred twenty-one thousand, one hundred thirty-two".